# Creating Double Number Line Diagrams

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Exploring Double Number Line Diagrams.

In one activity, we made green water by mixing 5 ml of blue water with 15 ml of yellow water. We want to make a very small batch of the same shade of green water. We need to know how much yellow water to mix with only 1 ml of blue water.

On the number line for blue water, label the four tick marks shown. On the number line for yellow water, draw and label tick marks to show the amount of yellow water needed for each amount of blue water.

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Creating a Double Number Line.

Below is a double number line for examining ratios and proportions. Do not enter fractions .

• Label your number lines (Label1 & Label2). ​ You can click and drag the diagram to see hidden parts.
• Choose a different number to replace 6 in Label1. ​
• Enter another number in Label2 to set up the ratio you desire. ​
• Create your Label1 number line by entering whole numbers. To do this, click in the box, then enter your value. You can also use the “Tab” key to move from one box to the next. ​
• The bottom quantity’s number line will automatically be populated.

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Creating Double Number Line Diagrams.

(A). A recipe for cinnamon rolls uses 2 tablespoons of sugar per teaspoon of cinnamon for the filling. Complete the double number line diagram to show the amount of cinnamon and sugar in 3, 4, and 5 batches.

(B). One batch of meatloaf contains 2 pounds of beef and 1/2 cup of bread crumbs. Complete the double number line diagram to show the amounts of beef and bread crumbs needed for 1, 2, 3, and 4 batches of meatloaf.

(C). A recipe for tropical fruit punch says, “Combine 4 cups of pineapple juice with 5 cups of orange juice.” Create a double number showing the amount of each type of juice in 1, 2, 3, 4, and 5 batches of the recipe.

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Locate and label the following numbers on the number line. Based on where you placed the numbers, locate and label four more fractions or decimals on the number line.

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Here is a diagram that represents the pints of red and yellow paint in a mixture.